Earth’s Energy Sources. Independent Learning Learning Activities: 1.Read the lesson materials before attending the lessons. 2.Attended the lessons.

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Presentation transcript:

Earth’s Energy Sources

Independent Learning

Learning Activities: 1.Read the lesson materials before attending the lessons. 2.Attended the lessons. 3.Reviewed the lesson materials after the lessons and determined whether the learning outcomes have been met. 4.Answered the lesson questions. 5.Completed exam questions. 6.Made notes or read additional material to clarify understanding or extend learning. Each Week: 1.YES or NO if learning activity completed or not. 2.0 – 5 to show how much you feel you have learnt for that week. 3.Maintain your file as evidence of the learning activities, including notes, answers to set questions, independent learning tasks and any additional reading Take Charge of Your Learning YES 4 By using this sheet every week!

Depth (km)Geotherm (°C)Melting point of Peridotite (°C) Temperature Variation within Earth’s Interior 1.Plot the data onto graph paper, with depth on the vertical axis. 2.Describe how the geotherm varies with depth. 3.Define the geotherm. 4.Locate the Earth’s internal layers on the graph. 5.Describe the physical state of the Earth’s interior in relation to the melting point curve. 6.Calculate the average geothermal gradient for the first 50km into the Earth.

Temperature Variation within Earth’s Interior Depth (km) Temperature (°C) Inner Core (solid) Outer Core (liquid) Asthenosphere (semi-solid) Mesosphere (solid)

Temperature Variation within Earth’s Interior Geotherm Melting curve Depth (km) Temperature (°C) Inner Core (solid) Outer Core (liquid) Lithosphere (solid) Asthenosphere (semi-solid) Mesosphere (solid) Where does this heat come from? Radiogenic heat Primordial heat

Heat flow (mW /m²) Km Mid-oceanic ridges Oceanic trench Oceanic lithosphere Continental lithosphere Subducting plate Benioff zone Oceanic crust Continental crust Asthenosphere Moho Partial melting (twice) Basaltic magma Andesitic magma Gabbro Dolerite dykes Basaltic pillow lavas Sediment Shield volcano Cone-shaped volcano Slab pull/ridge push

Mid-oceanic ridge Ocean trench Volcanic arc Ocean trench Mid-oceanic ridge Volcanic arc